[AltJIT] Adds AltJIT CLI tool to enable JIT on devices running iOS 17+

Commands:

altjit enable [app/pid] --udid [udid]
* Enables JIT for given app/process

altjit mount --udid [udid]
* Mounts personalized developer disk

AltJIT/AltJIT.swift

@@ -0,0 +1,18 @@
+//
+//  AltJIT.swift
+//  AltJIT
+//
+//  Created by Riley Testut on 8/29/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import OSLog
+import ArgumentParser
+
+@main
+struct AltJIT: AsyncParsableCommand
+{
+    static let configuration = CommandConfiguration(commandName: "altjit", 
+                                                    abstract: "Enable JIT for sideloaded apps.",
+                                                    subcommands: [EnableJIT.self, MountDisk.self])
+}